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Cross over to the opposite side at the chiasma.
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Nerve fibers from the medial aspect of each eye do what?
cross over to the opposite side at the optic chiasma
What part of a spinal nerve contains only efferent fibers?
The ventral root of the spinal nerve has the efferent fibers and the dorsal root has the afferent. Prior to joining each other in the spine they each consist of only those fibers.
What surrounds each bundle of nerve fibers?
A bundle of nerve fibers is surrounded by perineurium, a connective tissue that wraps around them.
Fibers from the medial side of each eye cross over to the opposite side of the brain at the?
Optic Chiasm
The area where some fibers from the eye cross over to the opposite side is called the?
Each eye contains an optic nerve, as the meet at the optic chiasm, some of the nerve fibers cross over. This sensitive area is referred to as the optic nerve pathway crossover.
What is the function of cerebral peduncles?
The cerebral peduncle is made of nerve fibers. There is one on each side of the brain, and they help transport nerve impulses from the higher part of the brain to the brain stem. Its main function is to control body movement.
What is the difference between nerve and neuron?
A neuron is an individual cell in the PNS or CNS that can be excited and conduct impulses along its axon. A nerve is a bundle of multiple neuron fibers that each are carrying their own signals. They are protected by connective tissue. Eventually the neuron fibers diverge away from the nerve to reach their destination.
The canal that runs through the core of each osteon (Haversian system) contains?
Central (Haversian) Canal is the canal that runs through the core of each osteon.
How many nerves are in your eyes?
Each eye has one nerve for vision, the optic nerve, Cranial Nerve II. Nerves are actually bundles of many nerve fibers. There are nerves that supply impulses for the muscles associated with the eyeballs so they can move are the Cranial Nerve III, Oculomotor, Cranial Nerve IV, Trochlear, and Cranial Nerve VI, the Abducens nerve.
What happens when you have 2 cerebral cortex?
You actually have two as the brain is divided into two hemispheres each covered by a cortex and connected by nerve fibers in the corpus callosum.
Do myelinated nerve fibers conduct signals faster than unmyelinated fibers?
Yes, unmyelinated axons, action potentials are generated at sites immediately adjacent to each other and conduction is relatively slow. Degree of myelination speeds up transmission.
What is 'modality of sensation'?
Each type of the principal type of sensation that we experience pain , touch, sight ,sound and so forth is called modalities of sensation. We experience these different modalities of sensation, while nerve fibers transmit only impulses. How is it that different nerve fibers transmit different modalities of sensation? 1. Each nerve tract terminates at a specific point in the CNS, and the type of sensation is determined by the point in the nervous system to which the fiber leads. So touch stimulus is carried by nerve impulses in the touch area of the brain. Similarly fibers from the eyes (retina) terminates in the "visual Corteses" of the brain, touch stimuli carried by nerve impulses in the "touch" area of the brain. 2.Moreover, each receptor organ is specialized to receive a particular type of stimuli and this is carried to the particular area of the bran.
